# MatchAnalysis.py
from random import random

def printIntro():
    print('这个程序模拟两个选手A和B的某种竞技比赛')
    print('程序运行需要A和B的能力值（以0到1之间的小数表示）')

def getInputs():
    a = eval(input('请输入选手A的能力值(0-1): '))
    b = eval(input('请输入选手B的能力值(0-1): '))
    n = eval(input('模拟比赛的场次: '))
    return a, b, n

def simNGames(n, probA, probB):
    winsA, winsB = 0, 0
    for i in range(n):
        scoreA, scoreB = simOneGame(probA, probB)
        if scoreA > scoreB:
            winsA += 1
        else:
            winsB += 1
    return winsA, winsB

def gameOver(a, b):
    return a == 15 or b == 15

def simOneGame(probA, probB):
    scoreA, scoreB = 0, 0
    serving = 'A'
    while not gameOver(scoreA, scoreB):
        if serving == 'A':
            if random() < probA:
                scoreA += 1
            else:
                serving = 'B'
        else:
            if random() < probB:
                scoreB += 1
            else:
                serving = 'A'
    return scoreA, scoreB

def printSummary(winsA, winsB):
    n = winsA + winsB
    print('竞技分析开始，共模拟{}场比赛'.format(n))
    print('选手A获胜{}场比赛，占比{:0.1%}'.format(winsA, winsA / n))
    print('选手B获胜{}场比赛，占比{:0.1%}'.format(winsB, winsB / n))

def main():
    printIntro()
    probA, probB, n = getInputs()
    winsA, winsB = simNGames(n, probA, probB)
    printSummary(winsA, winsB)

main()
